US8549048B2 - Workflow database for scalable storage service - Google Patents
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- the invention relates generally to management of data storage resources.
- ISP Internet Service Provider
- SSP Storage Service Provider
- ASP Application Service Provider
- FSP Floorspace Service Provider
- TSP Total Service Provider
- IT departments within the largest of companies look to reposition themselves as TSPs for their internal customers. They may use outside service providers, but that out-sourcing will be hidden from the internal user. This service delivery approach translates into an environment of tiered service providers—each one providing the same services to each of their customers.
- the invention provides methods and apparatus, including computer program products, for managing workflows in a service provider environment in which a service provider provides data storage resources to a customer.
- the methods include: (i) providing a customer with a list of types of work order requests based in a permission level associated with the customer, the work order requests comprising requests to manage storage configuration; (ii) receiving a selection of a type of work order request from the customer; (iii) enabling the customer to generate a work order request of the selected type in a work order request submission; (iv) creating a database object based on the work order request; and (v) storing the database object in a database.
- the workflow management scheme of the present invention allows a customer or service provider to track work order requests generated by the customer, as well as allows the service provider to generate billable events based on completion of work order requests.
- the workflow database can be queried either manually or by an automation to find new requests and perform the task associated with the work order request. It can also be used to store textual information related to the state of the work order and other information. Thus, if an automation is used to perform the task and fails, the xSP Administrator can detect the failure and perform the task manually.
- FIG. 1 is a depiction of an exemplary storage service delivery and management environment including a Service Provider Management System (SPMS) server that enables an xSP to provide storage and storage-related services to a customer (CxSP) as a service.
- SPMS Service Provider Management System
- FIG. 2 is a depiction of an exemplary multi-customer storage service delivery and management environment in which multiple SPMS servers are deployed within an xSP.
- FIG. 3 is a depiction of an exemplary tiered storage service delivery and management environment.
- FIG. 4 is a flow diagram illustrating interaction between an xSP and a “new” CxSP.
- FIG. 5 is a block diagram of an exemplary SPMS server software architecture.
- FIG. 6 is a depiction of various database tables created and maintained by the SPMS server, including a work order processing table.
- FIG. 7 is a depiction of an exemplary format of an entry in the work order processing table shown in FIG. 6 .
- FIG. 8 is a flow diagram illustrating work order submittal and processing.
- FIG. 1 illustrates an exemplary storage service delivery and management environment 10 .
- Storage provisioning and service management are enabled by a device referred to hereinafter as a Service Provider Management System (SPMS), which is implemented as a server architecture and thus operates on a server machine shown as the SPMS server 12 .
- SPMS Service Provider Management System
- the SPMS provides the necessary tools to allow service providers to grow a business around their ever-growing datacenters.
- the CxSP 16 includes a plurality of host servers 18 .
- the servers 18 are connected to an interconnect 21 , which can be a switch-based or hub-based configuration, or some other Storage Area Network (SAN) interconnect.
- the interconnect 21 includes one or more switches 22 , shown in the figure as a pair of switches 22 a and 22 b .
- switches 22 shown in the figure as a pair of switches 22 a and 22 b .
- the switch 22 a is connected to a first storage system 24 a and the switch 22 b is connected to a second storage system 24 b .
- the storage systems 24 represent a datacenter within the xSP.
- Each storage system 24 includes one or more data storage resources, such as a storage device (e.g., disk) or a storage-related service (e.g., data mirroring).
- the storage systems 24 are shown as Symmetrix storage systems, which are available from EMC Corporation, and the operation of the server 12 is described within the context of a scalable Symmetrix storage infrastructure. However, the storage infrastructure could include other storage system platforms and media types. It will be assumed that the storage in the Symmetrix systems 24 has been segmented into usable chunks.
- the storage systems 24 each are connected to the SPMS server 12 . Also connected to the SPMS server 12 and residing in the xSP 14 is a database server 26 .
- the database server can be implemented as an Oracle database server or any other commercially available database system.
- the database server 26 is used to store hardware management and customer information.
- SPMS server architecture can be configured for a number of different service model permutations.
- the CxSP owns the servers and perhaps the switches (as shown in the FIG. 1 ), which are connected to ports on the storage systems 24 maintained by the xSP, and may or may not allow integration of SPMS components with those servers.
- the xSP owns the servers 18 and/or the switches 22 , in addition to the storage systems 24 .
- the CxSP 16 includes a browser/GUI 28 , which is used as a CxSP console and allows an administrator for the CxSP 16 to perform tasks such as viewing the amount of used and free storage, assigning storage to the servers 18 , viewing usage reports and billing information, reports on the general health of the CxSP storage, and other information.
- the CxSP 16 can run browser sessions from multiple clients simultaneously.
- the connection from the SPMS client browser 28 to the SPMS server 12 is a TCP connection running secure HTTP, indicated by reference numeral 30 .
- the connection 30 can be a point-to-point Ethernet intranet that is directly cabled from the CxSP 16 to the xSP 14 , or some other type of point-to-point network connection that supports TCP/IP transmissions. It should be noted that the SPMS server 12 actually exports two HTTP interfaces: one for the CxSP administrator (via the browser/GUI 28 ) and another for an xSP administrator (also using a Web-based GUI, not shown).
- the SPMS server 12 is a Solaris machine running an Apache Web server.
- the server 12 communicates with the database server 26 to store and retrieve customer and storage system (e.g., Symmetrix) information.
- customer and storage system e.g., Symmetrix
- the database and the SPMS software could run on the same server.
- the database should be accessible from any one of those SPMS servers located in the same xSP environment, as will be described later.
- the SPMS server 12 links storage usage to customer accounts.
- the SPMS server 12 accomplishes this linkage by associating customer account information with the World Wide Name (WWN) of the Host Bus Adapter (HBA) that is installed on each server 18 in the CxSP 16 and uses the storage, and storing each association in the database 26 .
- WWN World Wide Name
- HBA Host Bus Adapter
- the SPMS server 12 connects to storage (the storage to be managed, e.g., individual storage systems or systems that may belong to a datacenter or SAN) and the database 26 to store information about the storage and the customers who are receiving the storage as a service.
- storage the storage to be managed, e.g., individual storage systems or systems that may belong to a datacenter or SAN
- the SPMS server 12 allows both xSPs and CxSPs to view, change and request storage-related information, as well as assign ownership to billable devices, for example, disks, volumes, ports, switches, servers, server Host Bus Adaptors (HBAs), among others.
- HBAs Host Bus Adaptors
- the SPMS server 12 also allows a service provider to generate billing information based on hardware configuration and customer usage of the configuration, and track events and services (such as mirroring or data backup, for example).
- FIG. 2 illustrates a multi-customer environment 40 in which multiple clients 16 are being served by the xSP site, which has been scaled to include multiple storage system systems 24 as well as multiple SPMS servers 12 .
- the multiple CxSPs 12 shown in this example as four CxSPs 16 a , 16 b , 16 c and 16 d , are supported within the environment of the xSP 14 .
- the xSP maintains three SPMS servers, 12 a , 12 b and 12 c , each of which is connected to and manages some subset of available storage systems 24 a , 24 b , . . . , 24 f .
- server 12 a is connected to storage systems 24 a and 24 b
- the server 12 b is connected to storage systems 24 c and 24 d
- the server 12 c is connected to storage systems 24 e and 24 f.
- Servers 18 and switches 22 belonging to CxSP 16 a and CxSP 16 b are connected to the Symmetrix units 24 a , 24 b , as shown, which in turn are connected to the SPMS server 12 a .
- the browsers in both CxSPs 12 a and 12 b are able to communicate with the SPMS server 12 a over their respective TCPs connections 30 a and 30 b to the SPMS server 12 a . Therefore, one or more clients can be added to the ports on the Symmetrix units, as well as to an SPMS server that is connected to and manages those Symmetric units.
- new storage systems can be added at the xSP site. Each new box would need to be connected to an SPMS server.
- the xSP also has the option of scaling the solution further by introducing new SPMS servers that are connected to new Symmetrix units, as is illustrated with the addition of servers 12 b and 12 c .
- Each new SPMS server has access to the database server 26 .
- each SPMS server is responsible for a certain set of storage systems so that there is no overlap among the SPMS servers and the storage systems for which they are responsible.
- the SPSM servers and database can be clustered for high availability.
- the xSP has the option of sharing multiple ports among several customers or dedicating ports exclusively to specific customers.
- FIG. 3 shows a tiered, managed storage infrastructure environment 50 that includes one or more customer domains 52 , e.g., domains 52 a (“domain 1”) and 52 b (“domain 2”), and one or more end user systems 54 , e.g. end user systems 54 a , 54 b , 54 c , . . . , 54 k .
- Each customer domain 52 is a logical collection of one or more “domain” servers 18 that are tracked for a single customer.
- the domain 52 a includes servers 18 a and 18 b
- domain 52 b includes server 18 c .
- the servers 18 a , 18 b , and 18 c are connected to the datacenter 24 via a SAN 55 .
- the SAN 55 resides in the xSP environment 14 and includes one or more SAN interconnection devices such as Fibre Channel switches, hubs and bridges.
- a single customer may have multiple domains.
- the xSP SPMS Server 12 provides to each of the customer domains 52 a Web interface to available storage and storage services in the datacenter 24 .
- the server 12 also tracks usage of each of the services.
- end user systems 54 which communicate with the servers 18 a , 18 b , and 18 c over the Internet 56 using their own GUIs, represented in the figure by end user GUI 58 , and one of domain Administrators (via Adminstration GUIs 28 a and 28 b ).
- the services can include, but need not be limited to, the following: storage configuration, which create volumes and place the volumes on a port; storage-on-demand to enable the end user to allocate storage in a controlled fashion; replication to enable the end user to replicate data from one volume to another in controlled fashion; disaster tolerance management service, if disaster tolerance is available and purchased by the customer; Quality of Service (QoS), which is provided only to the Administrator for controlling performance access; management of data backup services; logging, which logs all actions that take place on the SPMS Server; data extract/access—data is stored in the database and can be accessed or extracted by the Service Provider to pass the information into the billing system.
- the xSP Adminstrator uses an xSP Web based Administration GUI 60 as an interface to manage the entire environment.
- the Web based Domain Administration GUIs 28 a and 28 b are the Web based interfaces used by the domain administrators for domains 52 a and 52 b , respectively. Each connects directly to the Service Provider's SPMS server 12 or, alternatively, to a local domain SPMS server (shown as SPMS server 12 ′) and proxies into the xSP environment.
- the end user GUI 58 allows a domain end-user, e.g., 54 a , to provide a business function to users of that business function.
- the end-user 54 can also provide storage services through this GUI and a domain SPMS server such as the domain SPMS server 12 ′.
- the SPMS server 12 can be adapted for deployment in the customer and even the end-user environment, enabling the end-user to cascade out the services.
- the SPMS server provides different functionality in the xSP, customer and end user modes.
- FIG. 4 shows a process of associating storage with a CxSP 70 and involves both CxSP actions and xSP actions.
- the main actions on the part of the CxSP are performed by the Server Administrator (“ServerAdmin”) in charge of administration of the storage connected to a given server, and the CxSP Administrator (“CxSPAdmin”) in charge of procuring more storage and authorizing it for use by the Server Administration and given server.
- Server Administrator the Server Administrator
- CxSP Administrator CxSP Administrator
- the CxSP negotiates a contract with the xSP for a certain amount of storage at a certain price (step 72 ).
- the xSP creates SPMS accounts for the CxSP and assigns to the CxSP domain names, login names and passwords for use by the CxSP, and specifies billing parameters and storage options that the CxSP has selected under the agreement (step 76 ).
- the CxSP completes the physical connection (e.g., Fibre Channel and Ethernet) to the xSP machines (step 78 ).
- the xSP provides the physical connection from the CxSP equipment (e.g., the switches) to ports on the storage system based on the CxSP requirements (step 80 ).
- the CxSPAdmin logs onto the SPMS server using an assigned domain name, user name and password, and verifies that the contract terms (e.g., rates) are accurately specified in the account (step 82 ).
- the CxSPAdmin creates multiple accounts for ServerAdmins. For each ServerAdmin account, the CxSPAdmin assigns a storage pool of a certain size.
- the CxSPAdmin notifies the ServerAdmins that their accounts are ready and that they should run an SPMS server registration program on their respective servers (step 84 ).
- the SPMS server handles account creation requests for the CxSP as well as storage allocation parameters for each account (step 86 ).
- Each ServerAdmin initiates a registration request on each owned server (using the registration program) and logs onto the SPMS server to connect storage from the assigned pool.
- the ServerAdmin does whatever work is needed to ensure that the servers can see all of the storage allocated to those servers (step 88 ).
- the SPMS server receives the registration requests of each server, and uses information in the registration requests to associate the CxSP accounts with the appropriate storage (step 90 ).
- FIG. 5 shows a simple system configuration 100 , with a detailed view of the SPMS server software 102 .
- the SPMS software 102 includes a number of components, including an SPMS registration application (SRA) 104 , which resides in a tool repository on the server 12 , but is executed on each CxSP server 18 attached to the storage 24 , and a Web server 106 . Also included are various daemons, including a configuration poller 108 , a scratch pad configuration poller 110 , a metering agent 112 and an alert agent 114 , as well as “plug-in” modules 115 , a workflow process or automation 116 and services 117 .
- SRA SPMS registration application
- the SPMS software 102 further includes utilities 118 , for example, where Symmetrix storage systems are used, a Symmetrix Application Program Interface (API) and/or Command Line Interface (CLI) 118 and Volume Logix API/CLI 120 , as well as EMC Control Center (ECC) and scratch pad utilities (not shown). Further included in the software 102 is a link 122 to the database 26 and a Web page repository 124 .
- utilities 118 for example, where Symmetrix storage systems are used, a Symmetrix Application Program Interface (API) and/or Command Line Interface (CLI) 118 and Volume Logix API/CLI 120 , as well as EMC Control Center (ECC) and scratch pad utilities (not shown).
- EMC EMC Control Center
- the SPMS server is not directly connected to the servers 18 that use the storage 24 . Because the SPMS server needs information about those servers 18 and associated host bus adapters (HBAs) that are connected to the storage 24 , a mechanism which enables an indirect transfer of information from each server 18 to the SPMS server 12 is required.
- the storage system 24 includes a “scratch pad” 126 , which provides for just such a mechanism.
- the SPMS scratch pad 126 is a storage location on the storage system 24 that is used as a temporary holding device through which information is exchanged between the servers 18 and the SPMS server 12 .
- This storage location can be either on the storage media (e.g., on a disk) or in memory of the storage system 18 , or any other device “owned” by the xSP and to which the server 18 has access.
- a scratch pad utility (not shown) is used to read and write to the SPMS scratch pad 126 .
- the SPMS Web server 106 serves HTML pages to CxSP administrators as well as xSP administrators.
- the Web server architecture is made up of the following three areas: i) a user domain configuration module, which determines which users can access the Web server 106 and what permissions they have; ii) “back-end” modules which correlate to all of the software logic needed to access the Web pages, execute scripts, etc.; and iii) an external tool repository that contains tools that can be run on the CxSP machines, e.g., the SRA 104 , as well as value-added (and chargeable) software for the CxSP to download and run on CxSP servers.
- the configuration poller 108 is a process that constantly polls the ports to discover new Symmetrix units that have been added to the xSP site and checks for changes in currently managed Symmetrix units. Any additions are stored in the database and configurations that change are updated in the database. Although the configuration poller 108 is shown as monitoring only Symmetrix devices, it can be used to monitor any resource managed by the SPMS server 12 . In one embodiment, the configuration poller 108 uses the plug-in modules 115 to perform the polling function in a manner that recognizes new hardware and services, as described in co-pending U.S. patent application entitled “Pluggable Devices, Services and Events for a Scalable Storage Architecture,” filed on Nov. 20, 2001 in the name of Todd et al., and incorporated herein by reference.
- the scratch pad poller 110 is a process whose job it is to poll all connected Symmetrix scratch pads, and is used to collect in-bound scratch pad information as well as direct outbound information to the scratch pad 126 . In particular, it continually checks for transmit requests from registration applications. It retrieves each incoming request, validates the user and, if a valid request, causes the registration information to be stored in the database and a status to be returned to the registration application via the scratch pad 126 . Additionally, if the scratch pad poller detects a new Symmetrix, it creates a scratch pad for that Symmetrix. The scratch pad poller polling interval is user-defined.
- the metering agent 112 is responsible for sampling the latest storage system configuration information for the purpose of storing metering records in the SPMS database 26 .
- This information could be, for example, a daily snapshot of the storage system configurations, or more frequent snapshots of storage system performance information.
- the metering agent 112 performs the following tasks. It finds all connected storage systems at start-up, and stores the IDs of those systems in the database 26 . It creates “meter-able” objects or class files, converts the objects to XML, and stores the XML into the SPMS database 26 .
- the metering agent may choose to store the objects directly in the database or go through the SPMS Web server 106 .
- the “meter-able” objects can be, for example, directors, ports, disks, and volumes.
- the metering agent is programmed to wake up at a user-defined interval.
- the SPMS server 12 employs a mechanism for defining thresholds based on available and allocated capacity.
- the alert daemon 114 is responsible for monitoring these thresholds and sending out email alerts when they are triggered.
- the alert daemon 114 awakens periodically, and examines the precondition for each alert in an ALERTS table maintained in the database 26 . This is done through database operations (i.e., the alert daemon 114 will rely on the configuration poller 108 to keep the database view of the configuration up-to-date).
- the alert daemon 114 may be generalized to allow alerts to be defined by plug-in Java classes.
- the daemons can execute as separate processes or as individual threads inside a single process.
- the services 117 include such services as an Oracle DB engine, Oracle reporting services and notification services.
- the SPMS server uses the Symmetrix API and/or CLI 118 to gather configuration and performance information from the Symmetrix. For example, the CxSP server administrator may wish to query the SPMS server 12 about the health of the devices on the server. When this request hits the Web server 106 , the SPMS server 12 makes an API call to the appropriate storage system 24 to fetch the information.
- the SPMS server 12 uses Volume Logix utilities 120 for both viewing and setting WWN-to-volume mapping information.
- the SPMS server 12 uses the link 122 to access the Oracle database 26 in order to store customer account and billing information, storage system utility and performance information, as well as other information, in the database.
- the Web page repository 124 stores HTML Web pages that the Web server 106 serves to the clients, whether they be CxSP administrators or xSP administrators. These Web pages thus take input from the xSP or CxSP user in response to requests, e.g., requests to create user accounts, work order (task-related) requests and others. For example, the Web pages allow the user to run reports to view all of the “meter-able” aspects of assigned storage. Certain HTML pages can allow for the export of information to a third party tool such as a billing application. In one embodiment, style sheets take database information in an XML form and generate a display for the user.
- the SPMS Web server 106 handles work order requests submitted to the xSP 14 by xSP customers.
- Types of work order requests could include, for example, “connect storage to server”, “allocate storage to customer account”, “create a mirror”, “restore remote mirroring”, “split a business continuance volume (BCV)”, and so forth.
- the SPMS Web server 106 accepts the requests and, for each such work order request, creates a corresponding database object, which it stores in the database 26 .
- the object contains such elements as customer identifier, type of work order request, parameter values specified by the customer, status or state of work order request, as will be discussed later.
- the workflow process 116 processes any new work order request for which a database object has been created and recorded in the database 26 by the Web Server 106 .
- the process 116 examines such database records at predefined intervals and invokes any software on the SPMS server 12 , e.g. Volume Logix 120 , that is needed to perform tasks specified by the work order request.
- FIG. 6 illustrates the database 26 in some detail.
- the database 26 includes various tables 130 that are created and maintained by the SPMS server 12 .
- the tables include a customer account table 132 , a customer-resource association table 134 , one or more configuration tables 136 and one or more work order processing tables 138 , among others (not shown).
- the customer-resource association table 134 includes a field or fields for storing resource identifiers 140 , an equipment identifier field 142 for identifying the equipment (that is, server and HBA) connected to the resources specified in field(s) 140 .
- the identifier stored in the field 142 is the WWN for such equipment.
- the information in these fields is the result of resource allocation and WWN-to-device mapping by the SPMS server 12 using tools such as the Symmetrix and Volume Logix tools.
- the table 134 further includes a customer ID field 144 for identifying the customer that “owns” the resources specified in field(s) 140 under the terms of a contract between the customer and the xSP as described earlier.
- the customer ID field 144 in the table 134 is populated during the registration process.
- Each entry in the customer account table 132 includes a customer ID field 146 for storing an ID assigned to a customer account, fields for storing account information 148 and fields for storing billable events 150 .
- the fields 146 and 148 are populated with information when a customer's accounted is created by the SPMS server 12 .
- the association of customer ID with the resources that are used by that customer's server (server corresponding to the WWN) in the table 134 allows the SPMS server 12 to track usage of those resources by the customer and generate billable events, which the server 12 stores in the billable events field 150 of that customer's customer account entry in the customer accounts table 132 .
- the field 144 stores a customer account ID, but it will be appreciated that any customer information that identifies that customer and allows the SPMS server 12 to access the appropriate entry in the customer accounts table 132 could be used.
- the billable events can be provided to or are accessed by billing applications.
- the configuration tables 136 provide the SPMS server 12 with information about the hardware configuration of datacenter 24 .
- the SRA 104 is used to associate customers and servers with the storage that they use. Once the customer account has been created, as described earlier, the SRA is installed and executed on each of the servers.
- the details of an overall registration process 160 including the processing of the registration application at the server 18 and the processing that occurs on the SPMS server side, is described in co-pending U.S. patent application Ser. No. 09/962,790, entitled “Scalable Storage Service Registration Application,” incorporated herein by reference.
- the customer is required to run a registration application on the server in order to associate the already stored WWN of the HBA (for that server) and resource information with the customer's account. This enables billing and reporting services to be provided.
- the SRA must accept as input from the CxSP customer information such as username, password, account ID and customer domain information.
- the SRA must generate information about the server. There are 4 levels of information that could be generated, including: 1) customer information (username, password, domain, account ID, etc.); 2) hostname, type and revision, HBA WWNs; 3) per HBA, file system and device mapping information; and 4) third party application information (Oracle, Veritas, etc.) Only the first two levels of information are required.
- the basic purpose of the SRA 104 is to associate the HBA WWN running in the CxSP server with a customer, more specifically, a customer account.
- Other information about the customer's server environment can also be pushed down to the SPMS server 12 (via the scratch pad 126 ) to present more meaningful information about the customer, as discussed above.
- the WWN is a Fibre Channel specific unique identifier that is used at both ends and facilitates association of both end points (point-to-point).
- the switch 18 is FC, and therefore the unique identifier is WWN and thus described; however, the switch could be a SCSI MUX, or even a network switch if NAS is part of the infrastructure.
- the scratch pad could be used for other types of communication as well.
- a customer may want the storage allocation to be extended when the free space is below a certain threshold.
- the server may have a process to monitor free space and put a report in the mailbox.
- the SPMS retrieves the report and looks at the customer's policy, initiating a workorder to increase the size of the volume if the free space is below threshold. It could also be used to exchange information about billing events, information about server (QoS), as well as other types of information.
- QoS server
- the work order processing tables 138 maintain information about user-generated work order requests directed to and processed by the xSP 14 .
- the work order processing table entry 160 can include the following fields: a customer ID field 162 ; a work order ID field 164 ; a request type field 166 ; one or more parameter fields 168 for storing parameters (as well as arguments) to the request; a date/time field 170 for specifying the date and time the request was made; a description field 172 to store any textual description the customer or xSP wishes to include; and a state field 174 to indicate the state (e.g., “new”, “open”, “closed”, “failed”) of the work order request. Additional fields 176 for storing other types of information related to workorder processing may be included as well.
- work order submittal and processing 180 operates as follows.
- the Web server 106 verifies the login and determines the permission level of the customer (step 182 ). Based on the determined permission level, the Web server 106 presents the customer with a menu of available work request options (from which the customer is authorized to select) (step 184 ). The Web server 106 receives a selection from the customer and presents to the customer a set of one or more task screens that correspond to the selected type of work order request (step 186 ).
- the work order request is received (step 188 ) and is placed in the database 26 (step 190 ) by the Web server 106 . More specifically, the Web server 106 assigns a work order ID to the work order request (step 192 ) and creates an entry in the work order processing table 138 (step 194 ). Once the work order request and associated information have been stored in the work order processing table entry 138 , the assigned work order ID is provided to the customer (step 196 ). The work order ID can then be used to query the database to locate and view the status of the work order to which the ID was assigned.
- the customer may submit the request via an email-based submittal system (which may be supported on the server 12 or some other system within the xSP 14 ) or HTTP, or some other mechanism.
- the xSP 14 or more specifically, the xSP Administrator manually creates the workflow database entry 150 and returns to the customer an email confirmation which includes the work order ID.
- the Web server 106 or some other software component on the server 12 ) automatically creates the entry 150 and returns the work order ID to the customer who submitted the request.
- the workflow process 116 wakes up, locates the new work order in the database work order table entry 150 (based on the setting of the state field 174 ) and attempts to perform the requested task (step 198 ), or invokes other software to attempt to perform the requested task, based on the work order request type specified in field 166 and parameter values in parameter field 168 in the entry 150 .
- the workflow process 116 If the workflow process 116 successfully completes the task or determines that the task as successfully completed (step 200 ), the workflow process 116 closes the work order request by marking the state in the state field 174 as “closed” (step 202 ) and enters a billable event into the billable events field 150 in the customer account record for the customer (in the customer account table 132 ) that submitted the request (step 204 ). If the workflow process 116 determines that the task could not be completed (at step 200 ), the work order request is handled manually (step 206 ).
- the xSP Administrator queries the table entries 160 based on a state field 174 that indicates a failed work order request to locate the work order in the database 26 , uses appropriate tools to carry out the task specified by the work order and, once the task is completed, closes the work order request and enters a billable event into the customer's customer account record.
- the actual work order processing can be performed manually by the xSP Administrator from the outset.
- the xSP Administrator can query the database to find new or open requests, perform the requested task (if possible) and close the work order when the task is completed.
- the xSP Administrator can update the state field 174 with an appropriate state indicative of the status of the work order, as well add textual comments to the description field 172 of the workflow item as needed.
- the xSP Administrator handles the generation and storing of the billable event as well.
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US10/024,796 US8549048B2 (en) | 2001-12-19 | 2001-12-19 | Workflow database for scalable storage service |
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